/* CSS Document */
*{
margin:0 auto;
padding:0;

}

body > div{
border: 1px dashed;

margin: 5px;
padding: 5px;
}

.barraEsquerda{
float:left;
margin-top:0;
width: 170px;
height:100px;
background: red;
}
.conteudo{
margin-left:192px;
margin-right:162px;
height:300px;

}
.topo{
margin-left:192px;
margin-right:162px;
height:30px;

}
.barraDireita{
float:right;
margin-top:0;
width:140px;
height:100px;
}

}